Your Thoughts On This Hand - Opp. River Bets All In

[FakeKramer]

$20 tournament on Stars. No read worth mentioning on villan. 880 started, 300 are left. Average stack roughly 4,000. What should I have done here? Why? Where did I play the hand bad? What did he have?

PokerStars No-Limit Hold'em Tourney, Big Blind is t150 (9 handed) converter

UTG (t1270)
UTG+1 (t2495)
MP1 (t10660)
MP2 (t2555)
MP3 (t830)
CO (Villan)/ (t2635)
Button (t3550)
SB (t3880)
Hero (t3910)

Preflop: Hero is BB with 3[img]/images/graemlins/diamond.gif[/img], 3[img]/images/graemlins/club.gif[/img].
<font color="#666666">2 folds</font>, MP1 calls t150, <font color="#666666">2 folds</font>, CO (Villan)/ calls t150, <font color="#666666">1 fold</font>, SB completes, Hero checks.

Flop: (t600) 4[img]/images/graemlins/heart.gif[/img], 2[img]/images/graemlins/diamond.gif[/img], 5[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(4 players)</font>
SB checks, <font color="#CC3333">Hero bets t450</font>, MP1 folds, Villan calls t450, SB folds.

Turn: (t1500) 7[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets t850</font>, Villan calls t850.

River: (t3200) 2[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
Hero checks, <font color="#CC3333">Villan bets t1185 (All-In)</font>