JJ hand in Big Blind all hearts flop

[staunchdog]

30 person brick and mortar NL holdem tournament. We're still at the first blind level. Everyone started the tournament with 2000T, and I have about 1600T. The blinds are at 10-20, and everybody has about the same amount of chips, give or take a few hundred.

Action:
CO calls the big blind, button raises to 80, SB (loose player) calls

Hero, in the BB, sees Jd,Jh, raises to 280. CO folds, button (who has me covered) calls, SB folds.

Flop (400T)
3h 6h 9h

Hero bets 400T, Button thinks for a long time, then calls. No strong read on the button.

Turn (1200T)
6d

Hero checks, Button pushes all in for hero's last 1200. Hero calls.
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What do you think of my play?