1. Your bag isn't 65 ltrs = it is 65 ltrs
rope = paracord
sleeping bag = snugpak winter thing
How do you know the volume? Have you measured it? There is a great discrepancy between the stated volume and true volume. Some brands are notorius for this, sometimes stating "compressed volume" etc. It is also a kind of modern trend to overstate the volume. I compared the 100 ltrs berghaus atlas with a 100 liters sacci, and the berghaus was dwarfed in comparison.
It sounds weird that you couldn't get that stuff in your pack, on a 9 days wintertrip I managed to cram a lot more in a 70 ltrs sacci (although that pack actually holds 70 metric liters). Among the things I crammed in there was a full trangia, a big synthetic winter sleeping bag, down jacket, slr-camera, 1l thermos, synthetic thermopants, spare set of thermals, 9 pairs of socks, fuel and food for 11 days (winter rations).