The Army is deploying a new "medium" MOLLE ruck for Afghanistan - it will hold 3,000 Cubic Inches (CI).
The MOLLE large hold 5,000 CI; the assault pack holds 2,000 CI.
The main pocket of the ALICE large is - you guessed it - 3,000 CI.
http://defensetech.org/2009/12/21/ex...or-afghan-ops/