Cost to send ETH from ledger to exchange

Hello fellow ethereum holders,

I have a question: I hold some ethereum on a ledger nano S. Sometimes I think about to sell some of my ethereum but a friend told me he that to send ethereum to a exchange from a ledger nano S, that the cost of this is ridiculous. He is talking about , let’s say you send 1 eth, you will have to pay like 700 dollar. Is this true? How can I know what the cost is to send ethereum from a ledger to a exchange?

Thanks in advanced for your help guys.