Semi-steal at FT w/ 33 gets shoved, what do I do?

[tcmNOWAY]

On the button here w/ 19 1/2 BB's and the SB puts me in a tough spot, 3betting AI. I barely have him covered and he's played tight with a medium-short stack for a while now. Is this a coin toss or should I fold?

Full Tilt Poker Game #4221515396: $2 + $0.25 Sit & Go (32032780), Table 2 - 50/100 - No Limit Hold'em - 20:29:14 ET - 2007/11/18
Seat 1: tcm_NOWAY (1,940)
Seat 2: pupek (1,780)
Seat 3: charaboy (1,970)
Seat 4: linda367 (5,890)
Seat 5: scrutator23 (9,350)
Seat 6: DrawinDown (2,020)
Seat 7: gec975 (4,050)
pupek posts the small blind of 50
charaboy posts the big blind of 100
scrutator23 is feeling happy
The button is in seat #1
*** HOLE CARDS ***
Dealt to tcm_NOWAY [3d 3h]
linda367 folds
scrutator23 folds
DrawinDown folds
gec975 folds
tcm_NOWAY raises to 500
pupek raises to 1,780, and is all in
charaboy folds
tcm_NOWAY ???