He cold-called my check-raise and others came along. Now what?

[blockafor]

I haven't posted a hand in awhile. This one's from a 4/180. The cold call of my check raise threw me off, then everyone called building the pot. My plan was to check-call the turn to keep the pot small. Is that too weak? Should I bet this turn? If so, how much?

PokerStars No-Limit Hold'em Tourney, Big Blind is t20 (9 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

MP3 (t1580)
CO (t1510)
Button (t950)
SB (t1330)
Hero (t2680)
UTG (t1410)
UTG+1 (t1890)
MP1 (t1820)
MP2 (t1740)

Preflop: Hero is BB with Q[img]/images/graemlins/club.gif[/img], K[img]/images/graemlins/spade.gif[/img].
<font color="#666666">2 folds</font>, MP1 calls t20, MP2 calls t20, <font color="#666666">2 folds</font>, Button calls t20, <font color="#666666">1 fold</font>, Hero checks.

Flop: (t90) Q[img]/images/graemlins/diamond.gif[/img], 8[img]/images/graemlins/spade.gif[/img], 5[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(4 players)</font>
Hero checks, MP1 checks, <font color="#CC3333">MP2 bets t20</font>, Button calls t20, <font color="#CC3333">Hero raises to t110</font>, MP1 calls t110, MP2 calls t90, Button calls t90.

Turn: (t530) 7[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(4 players)</font>
Hero checks, MP1 checks, MP2 checks, Button checks.

River: (t530) 5[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(4 players)</font>
<font color="#CC3333">Hero bets t220</font>, MP1 folds, MP2 folds, Button folds.

Final Pot: t750