Currently this is my setup:

ESP M-300 FM ----> TU-3 ---> Dunlop Crybaby ---> POD HD Pro ---> (FX send) Ernie ball VP jr. ---> HD Pro (FX return) ---> PA system

Instead of plugging into my PA system, could I plug the line out of the HD Pro directly into a Guitar Cab?  I am upgrading my amp soon and currently dont have money for the amp head but I do have enought for the cab.  Could I buy the cab now and use just that while i save up for the head?  I'm not sure if the POD HD Pro output is 4 ohms or whatever I need.  Thanks