A couple things come to mine. First, you have a soft voice naturally so be sure to speak clearly and firmly. Speak into the mic and hold it in front of your mouth a few inches away. Check that you are not set for half deviation, not sure if the FT-2800 can do this though it's a problem on a lot of HTs. There might be a mic gain, if so increase in small amounts, say 5 steps on a scale of 100, until you get good signal reports.
'91 Pickup - Imelda
'08 Tacoma TRD - Donna
'09 Kawasaki KLR650
'12 Gunnar Rockhound 29
"Our task must be to free ourselves from this prison by widening our circle of compassion to embrace all living creatures and the whole of nature in its beauty. Nobody is able to achieve this completely, but the striving for such achievement is in itself a part of the liberation and a foundation for inner security. " --Albert Einstein