villain is kinda nit 12-9 and both blinds are whale loose-passive > 50% vpip types. Flop is interesting, villain's c-bet is 60% and he isn't c-betting this flop with air ever. AJ/KQ/AK are all in his range. Is this a trivial raise? how big?

Full Tilt No-Limit Hold'em, $0.50 BB (9 handed) - Full Tilt Converter Tool from FlopTurnRiver.com

Button ($51.55)
SB ($79.75)
BB ($78.60)
UTG ($48.50)
UTG+1 ($105.30)
MP1 ($50)
MP2 ($80.55)
Hero (MP3) ($56.10)
CO ($50)

Preflop: Hero is MP3 with J, Q
3 folds, MP2 bets $1.75, Hero calls $1.75, 1 fold, Button calls $1.75, 2 folds

Flop: ($6) Q, 10, 9 (3 players)
MP2 bets $3.50, how big?