TT, overpair, help?

[Esperante]

Villain is 40/9/2.33 been really aggessive. wasnt sure to do here.

thanks.

Cryptologic
No Limit Holdem Ring game
Blinds: $0.25/$0.50
6 players
Converter

Stack sizes:
UTG: $52.05
UTG+1: $73.70
CO: $51.23
Button: $33.50
SB: $50.42
Hero: $52.55

Pre-flop: (6 players) Hero is BB with T[img]/images/graemlins/spade.gif[/img] T[img]/images/graemlins/diamond.gif[/img]
<font color="#cc0000">UTG raises to $1.5</font>, UTG+1 folds, CO calls, 2 folds, Hero calls $1 <font color="#aaaaaa">(pot was $3.75)</font>.

Flop: 6[img]/images/graemlins/spade.gif[/img] 9[img]/images/graemlins/heart.gif[/img] 7[img]/images/graemlins/diamond.gif[/img] ($4.75, 3 players)
Hero checks, <font color="#cc0000">UTG bets $3</font>, CO calls, Hero calls $3 <font color="#aaaaaa">(pot was $10.75)</font>.

Turn: 7[img]/images/graemlins/spade.gif[/img] ($13.75, 3 players)
<font color="#cc0000">Hero bets $6</font>, UTG folds, <font color="#cc0000">CO raises to $12</font>, Hero ????

wasnt sure what to do... I was sure I was beat.... but possibly not.