At this time, the option to avoid the 2.9% charge is unavailable. It is a default amount automatically charged to your account upon doing the transaction. Though this is fixed, you can try to negotiate with Stripe to reduce your rate.
To better and securely assess your account, I'd recommend contacting Stripe's customer support specialists. They may also provide other options specifically to your business.
This should get you routed to the right direction. If you have a minute, you can check out this blog for more information: