问如何过滤出docker volume inspect www-vol的路径？

[root@ceph-client ~]# docker volume inspect www-vol 
[
    {
        "CreatedAt": "2020-11-05T21:33:33+08:00",
        "Driver": "local",
        "Labels": {},
        "Mountpoint": "/var/lib/docker/volumes/www-vol/_data",
        "Name": "www-vol",
        "Options": {},
        "Scope": "local"
    }
]

如何过滤出 /var/lib/docker/volumes/www-vol/_data 路径？