Flat call reraise with suited connector and flop top pair

[betgo]

$2600. Villain is new to the table and is not known to me. What do I do? What is my plan? Was the flat call of the reraise bad?

Full Tilt Poker
No Limit Holdem Ring game
Blinds: $30/$60
9 players
Converter

Stack sizes:
UTG: $2560
UTG+1: $12200
MP1: $5805
Hero: $5740
MP3: $13979
CO: $3183
Button: $5229
SB: $9801
BB: $6914

Pre-flop: (9 players) Hero is MP2 with J[img]/images/graemlins/heart.gif[/img] 9[img]/images/graemlins/heart.gif[/img]
3 folds, <font color="#cc0000">Hero raises to $180</font>, 3 folds, <font color="#cc0000">SB raises to $540</font>, BB folds, Hero calls.

Flop: 8[img]/images/graemlins/diamond.gif[/img] J[img]/images/graemlins/spade.gif[/img] 5[img]/images/graemlins/diamond.gif[/img] ($1140, 2 players)
<font color="#cc0000">SB bets $760</font>, Hero ???