Setup: Live MTT $32+$13 buy in (yes, rake is CRAZY). Payout is steep with the whole final table getting paid. 90 for 10th with small increases up to 360 for 3rd, 700 for 2nd, 1650 for 1st. Final 2 tables with 14 out of 124 players remaining. Hero is BB and is the chipleader at the table with about 20k, 2nd in the tournament. Blinds and antes are 1k/2k a200 and we are now 7-handed. SB couldn't post a full SB with only 800 left in his stack before blinds and antes. After posting, the main pot contains 2600 and there's 1200 in a sidepot to start.

Folds to CO who pushes with 4400 in chips. CO moved to this table last orbit and so far he pushed once from the CO which was his 2nd hand here and once more UTG. Nobody called his pushes but he seems to be a solid player. Hero looks down and sees a meager 93o. What's hero's move here?