Not much info on the player but hes running 45/3 over 31 hands. Pretty sure im bet/folding this river.. Bet 2445 into 9895 pot leaving myself 6500 behind. Is this sizing okay? Should I have played this any different?

Full Tilt Poker Game #21220359389: $10,500 Guarantee (Rebuy) (163347725), Table 42 – 50/100 – No Limit Hold’em – 21:48:06 ET – 2010/05/29
Seat 1: GMir (5,320)
Seat 2: WoundLicker (7,800)
Seat 3: pass340 (2,695), is sitting out
Seat 4: ocsys2002 (3,500)
Seat 5: Nelly736 (8,310)
Seat 6: GeneGenius (12,290)
Seat 7: Wonderifical (13,600)
Seat 8: Absolute_Phear (4,760)
Seat 9: vetteman5 (15,973)
Wonderifical posts the small blind of 50
Absolute_Phear posts the big blind of 100
The button is in seat #6
*** HOLE CARDS ***
Dealt to Wonderifical [7c 5s]
vetteman5 calls 100
GMir folds
WoundLicker has 15 seconds left to act
WoundLicker calls 100
pass340 folds
Nelly736 folds
GeneGenius folds
Wonderifical calls 50
Absolute_Phear checks
*** FLOP *** [5d 6d 4s]
Wonderifical bets 255
Absolute_Phear calls 255
vetteman5 raises to 510
WoundLicker has 15 seconds left to act
WoundLicker folds
Wonderifical has 15 seconds left to act
Wonderifical raises to 1,320
Absolute_Phear folds
vetteman5 calls 810
*** TURN *** [5d 6d 4s] [8d]
Wonderifical has 15 seconds left to act
Wonderifical has requested TIME
Wonderifical checks
vetteman5 has 15 seconds left to act
vetteman5 bets 3,300
Wonderifical has 15 seconds left to act
Wonderifical has requested TIME
Wonderifical calls 3,300
*** RIVER *** [5d 6d 4s 8d] [4c]
Wonderifical has 15 seconds left to act
Wonderifical has requested TIME
Wonderifical bets 2,455
vetteman5 has 15 seconds left to act
vetteman5 calls 2,455