$16:QQ overpair in multiway pot

[cardworm]

Hello!

PokerStars Tournament, Big Blind is t20 (9 handed) Converter on pregopoker.com

UTG (t1480)
UTG+1 (t1500)
MP1 (t1500)
Hero (t1500)
MP3 (t1480)
CO (t1400)
Button (t1490)
SB (t1400)
BB (t1750)

Preflop: Hero is in MP2 with Q[img]/images/graemlins/heart.gif[/img] Q[img]/images/graemlins/diamond.gif[/img]
<font color="gray">UTG folds</font>, UTG+1 calls t20, <font color="gray">MP1 folds</font>, <font color="red">Hero raises to t100</font>, <font color="gray">MP3 folds</font>, CO calls t100, <font color="gray">Button folds</font>, <font color="gray">SB folds</font>, BB calls t80, UTG+1 calls t80

Flop: (t410) 5[img]/images/graemlins/spade.gif[/img] 7[img]/images/graemlins/diamond.gif[/img] 3[img]/images/graemlins/diamond.gif[/img] (4 players)
BB checks, UTG+1 checks, <font color="red">Hero bets t320</font>, CO calls t320, <font color="red">BB raises to t640</font>, <font color="gray">UTG+1 folds</font>, <font color="red">Hero ?

Whats your action here,can u find a fold after one coldcall?
Use sharkscope?

I pushed in this hand because I thought that the pot was already to big.