2500nl- JJ facing an overbet on rags

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About three orbits at the table. Villain has been fairly aggressive, but not maniacal. Shortstack is very donkish.

Ultimate Bet No-Limit Hold'em, $25 BB (5 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FCP)

BB ($408)
UTG ($3505)
MP ($3167)
Button ($2495)
Hero ($2499)

Preflop: Hero is SB with J [img]/images/graemlins/spade.gif[/img] , J [img]/images/graemlins/heart.gif[/img] .
1 fold, MP raises to $85, 1 fold, Hero raises to $280, BB raises to $295, MP raises to $885</font>, Hero calls $605.

Flop: ($2065) 9 [img]/images/graemlins/diamond.gif[/img] , 5 [img]/images/graemlins/club.gif[/img] , 2 [img]/images/graemlins/club.gif[/img] (3 players)
Hero checks, MP bets $2178

My thinking: He's going to flat-call with a bigger pair than mine. He's probably doing this with big cards.