That's only a little more than the EU price of 699 Euro or approx $813. Part of that is VAT which is included the price (right?) instead of being added at checkout like the US. That would bring the USD price up to $713. IDK where the rest of the increase would come from though.

edit: Denmark VAT is actually 25% not 20% so the USD price plus Denmark VAT is ~$750

Taking the German price of 699 Eur and accounting for the extra VAT in Denmark (25%) vs Germany (19%) I get 853 USD which means you're basically in line with the price for Germany which I expect is close to the price for the rest of the EU +/- VAT.

So the higher price in Denmark looks like VAT + some extra costs for being in the EU market; import duties, corporate taxes, etc.