I talked to Rob Strickland a couple of days ago and the answer was 1500 +/- 1000. It's clearly fluid. Other LCPs I've talked to in the last week said 1700. The common denominator that they all communicated that it was all predicated on airplane deliveries. It seems to me that right now the deliveries are proceeding as scheduled, which bodes well.
Bearing in mind that, at least for the time being, the new 787 deliveries are essentially offsetting all of our 777s that are parked.