You'll no doubt have to go to a freight agent. Even to fit a B747F, you'll have to dismantle it. At a guess you'll have to take the wings/empennage off. They'll need the dimensions of the dismantled/packed pieces & weight.
You will probably be paying for the volume your aircraft occupies in the freighter ("chargeable weight") so beware. Don't think you will be paying lets say 1000KG x $1.... (2 positions in a 74F count as 6.4T "chargeable" as a rough guide).
This will be an expensive exercise, would suggest you compare prices with sea-freight assuming cost IS an issue and time ISN'T an issue.
rgds