There are 2 types of esc, one with a Battery Elimination Circuit, BEC and, one that doesnt have a BEC and is called an Opto esc. These may also be known by other names.
An esc with a BEC will normally step down your motor power battery to around 4.8v. More expensive ones give you the option of selecting around 4.8v upto around 8v.
If your esc is an Opto, you must power the Rx by a separate battery supply. Again, this is normally around 4.8v although more modern and expensive Rx's can run off upto 8v. This separate battery power must not be plugged into the BEC esc.
Your radio frequency has no impact on esc, only the voltage the Rx can handle is something that may need to be considered.