Another extracting value hand

[Whitey]

PokerStars No-Limit Hold'em Tourney, Big Blind is t1200 (9 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

UTG (t56014)
UTG+1 (t25230)
MP1 (t32806)
MP2 (t19645)
MP3 (t32950)
CO (t52730)
Button (t34761)
SB (t8134)
Hero (t35205)

Preflop: Hero is BB with 4, 5.
[color=#666666]2 folds</font>, MP1 calls t1200, [color=#666666]4 folds</font>, SB completes, Hero checks.

Flop: (t3600) 2, 5, 5 [color=#0000FF](3 players)</font>
SB checks, Hero checks, MP1 checks.

Turn: (t3600) 5 [color=#0000FF](3 players)</font>
SB checks, Hero checks, MP1 checks.

River: (t3600) 2 [color=#0000FF](3 players)</font>
SB checks, [color=#CC3333]Hero bets ??? How much?